whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. bool? noKernelTun,
    2. String secretKey,
    3. List<String>? address,
    4. List<WireGuardPeerConfig>? peers,
    5. @JsonKey.new(name: 'mtu') int? mtu,
    6. List<int>? reserved,
    7. XrayTargetStrategy? domainStrategy,
    )?
)

A variant of when that fallback to returning null

It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case _:
    return null;
}

Implementation

@optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  TResult? Function(
          bool? noKernelTun,
          String secretKey,
          List<String>? address,
          List<WireGuardPeerConfig>? peers,
          @JsonKey(name: 'mtu') int? mtu,
          List<int>? reserved,
          XrayTargetStrategy? domainStrategy)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _WireGuardConfig() when $default != null:
      return $default(_that.noKernelTun, _that.secretKey, _that.address,
          _that.peers, _that.mtu, _that.reserved, _that.domainStrategy);
    case _:
      return null;
  }
}